Install Apple Bootlogo from Cydia, then you should get the Library / BootLogos Bootlogo folder and in the settings.
This should enable animated bootlogo.
This made it possible for me when I was on 4.3.3.

Install Apple Bootlogo from Cydia, then you should get the Library / BootLogos Bootlogo folder and in the settings.
This should enable animated bootlogo.
This made it possible for me when I was on 4.3.3.